War is the continuation of policy. Consequently, we must examine the policy pursued prior to the war, the policy that led to and brought about the war. If it was an imperialist policy, i.e., one designed to safeguard the interests of finance capital and rob and oppress colonies and foreign countries, then the war stemming from that policy is imperialist. If it was a national liberation policy, i.e., one expressive of the mass movement against national oppression, then the war stemming from that policy is a war of national liberation.

The philistine does not realize that war is “the continuation of policy”, and consequently limits himself to the formula that “the enemy has attacked us”, “the enemy has invaded my country”, without stopping to think what issues are at stake in the war, which classes are waging it, and with what political objects.

For the philistine the important thing is where the armies stand, who is winning at the moment. For the Marxist the important thing is what issues are at stake in this war, during which first one, then the other army may be on top.

V. Lenin